Rotating tying device on a machine for tying warp threads



Nov. 26, 1963 F. v. H. J. FAURING 3,11

,ROTATING TYING DEVICE ON A MACHINE FOR TYING WARP THREADS Filed Feb. 27, 1961 ,i .5 zq ,0 m

- INVENTOR.

United States Patent Washington 4, D.C.)

Filed Feb. 27, 1961, Ser. No. 91,966 1 Claim. (Cl. 289-) To tie the ends of one warps threads to those of another warp, machines are employed which comprise a rotating tying device, in the following to be called a tying bill or knotting mechanism.

There exists a variety of constructions in the field of such tying devices. One of these, which is widely used in the textile industry, consists of three parallel and adjoining horned blades, which are held together by means of a pin in such a way that the middle blade may be moved in relation to the outer blades to form a kind of a scissors. When tying a knot the threads are wound around the hooks or horns of the blades as the bill rotates once to form a loose noose. Then the middle blade opens into scissors position, whereupon the ends of the threads are placed into the cutting jaws. The middle blade returns thereafter into its closed position whereby the threads are held fast between the middle blade and one of the outer blades, while excessive ends of the threads are cut off between the middle blade and the other outer blade. After this the thread noose is pulled away from around the blades, at the same time being held fast, and tightened into a knot. The threads are held fast no stronger than is necessary, permitting their removal by a relatively light pull.

This kind of tying bill has hitherto suffered from the defect that for every variation in thickness or quality of threads a different bill has to be used, in order to secure the necessary holding-fast action between the blades. If the threads are held too loosely the result will be too loosely tied knots which will have to be tied again. If on the other hand the threads are held too tightly they will not be pulled away in time before the tying bills next rotation of the bill and so they will be torn.

Furthermore, in case an excessively thick thread is held fast the two clamping blades will not be parallel, with the result that the thread near the pin will be held very fast, while the thread nearer the tips of the blades will almost not be held at all so that on being pulled away the outer thread will leave the inner one behind, thus undoing the noose.

The above mentioned disadvantages are eliminated in accordance with the present invention which can be adapted and adjusted to permit the use of practically all sizes and qualities of threads known in the textile industry, such threads both to be held fast and cut off appropriately. Thus only one knotting mechanism per ty'ing machine is necessary.

The features of the present invention are described in the following disclosure taken in conjunction with the accompanying drawing, in which- FIG. 1 shows a frontal View of the tying device.

'FIG. 2 shows a section along the line 11-11 in FIG. 1 looking in the direction of the arrow.

FIG. 3 shows a partial section along the line III-III in FIG. 1 looking in the direction of the arrow.

FIG. 4 is a cross sectional view on the line IV-IV in FIG. 2.

FIG. 5 is a detail view showing the shape of the hooks or horn-s on the three blades.

FIG. 6 is a side view of the relatively stationary but late-rally adjustable blades.

FIG. 7 is a side vie-w of the reciprocatory blade.

3,112,132 Patented Nov. 26, 1963 The tying bill comprises a rotatable cylindrical part 1 with a longitudinally extending hollow portion divided by a longitudinally extending rigid rail or wall 19 to form two longitudinally extending passageways or compartments. in that hollow portion are two outer adjustable blades 2. and 3 and one middle or intermediate blade 4 which is longitudinally movable. The blade 4 is disposed in one passageway or compartment and slides against one face of the wall .19 and in the same passageway is the relatively stationary but laterally adjustable blade 2'. The other relatively stationary but laterally adjustable blade 3 is in the other passageway or compartment and in engagement with the other side of the wall 19. The parallel blades 2, 3 and 4 extend beyond the front end of the rotary cylinder 1 and are provided with hooks or horns 5, 6 and 7 respectively. The outer blades 2 and 3 are similar or identical and have flaps or extensions 8 and 9 near each end of the cylinder 1. The middle blade 4 has flap 10 in front and a rearward extension 11 at the back of cylinder 1. To extension 11 a fork 12' and pin 13 connected to a pull rod 14 which is controlled by the certain organs of the tying machine not shown here. The pivot pin v13= is disposed in alined holes in the extension 14 and the blade 4, the hole in the latter being shown at 13 in FIG. 7. Thus blade 4 and its horn 7 can be moved forwards and backwards. A filler piece 15 secured by pins 16 is inserted in order to keep blades 2, 3 and 4 in position.

The threads to be tied are wound once around blades 2, 3 and 4 inside horns 5, 6 and 7 whereafter blade 4 is pulled back to the position shown by the broken line in FIG. 2, the threads are then wound further into the space or opening 17 between horns 5 and 6 and horn 7. Then blade 4 returns into its place, whereby the threads are held fast between horns 6 and 7, while excessive ends are cut oil between horns 5 and 7. Following this the noose is pulled away from the horns 5, 6 and 7 and tightened into a knot. As will be seen upon reference to FIGS. 5, 6 and 7, the rear edge of the horn 5 is sharpened at 5 to coact with the sharpened front or leading edge 7 of the horn 7, while the adjoining edges of the horns 6 and 7 have rounded edges shown in FIG. 5.

The linear distance between the blades 2, 3 and 4 can be adjusted by means which are shown here comprising set screws 17 and 1'8 and leaf springs 20' and 21. Set screw 17 is in piece 15 and thrusts again-st a bowed rectangular leaf spring 20 that extends along one side of the blade 2 to press the latter against the blade 4 and in turn press the blade 4 against the wall 19, as shown in FIG. 3. Set screw 18 is threaded in the cylinder 1 on the opposite side of the device and thrust-s against the similar bowed rectangular leaf spring 21 that extends along the blade 3 to press the latter against the other side of the wall 19, as shown in FIG. 3. By the use of the spring 20 and set screw 17, the pressure between the blades 2 and 4 is resilient enough to prevent any tearing of the threads while at the same time it is strong enough to insure a clean cutting action of the horns 5 and 7; and similarly by the use of the spring 21 and set screw 18 the linear relation between the outer portions of the blades 3 and 4 is adjusted to fit the various sizes and qualities of threads and the yielding or resilient pressure of the spring 21 against the blade 3 ensures an optimal holding fast action, permitting the finishedand tight knot to be pulled away. It will be noted on reference to FIG. 3 that the outer portion of blade 3 is slightly offset toward blade 4.

I declare that what I claim is:

A tying bill or knotting mechanism for a warping machine comprising, a rotatable cylinder having a longitudinally extending hollow portion, a longitudinally extend- 3 ing rigid wall in said hollow portion dividing it into two longitudinally extending passageways, a reciprocatory blade in one of said passageways and having one of its sides in slidable contact with one side of said wall, the last mentioned blade having a projecting front end provided with a movable hook having one edge rounded and the other edge sharpened, a first outer blade in said one passageway disposed on the other side of said reciprocatory blade and in contact therewith, said first outer blade having a projecting end with a hook to coact with the first mentioned hook and having one edge sharpened, a second outer blade in the other of said passageways disposed against the other side of said wall, said second outer blade having a projecting end provided with a hook to coact with said hook of the reciprocatory blade and having one edge rounded, a first longitudinally bowed leaf spring in said other passageway disposed against said second outer blade, a screw threaded in said cylinder and thrusting against said first leaf spring, a second longitudinally 'bowed leaf spring in said one passageway and disposed against the other side of said reciprocatory blade, and a second screw threaded in a part of said cylinder and thrusting against said second leaf spring.

References Cited in the file of this patent UNITED STATES PATENTS 

